标签：Intellige 相关文章
A Stationary Satellite, part 1 Some of the best devices in science have been anticipated by science fiction writers years before they existed. Occasionally a writer comes up with an idea that can be put into practice within their lifetime! Such is th
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What Are Reflexes? If youve ever blinked at a sudden light, jerked your hand away from something hot, or jumped at a loud noise, then you know that these are not actions we consciously plan. Rather, they happen involuntarily. Such sudden, unconscious
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Everyone knows the story of the Titanic, the great ocean liner that struck an iceberg and sank to the bottom of the Atlantic. Less widely known is the icebergs story: where did it come from, and how did it get in the way of the ship? Although the vas
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In the early 1800s, a French physician named Ren Laennec had a dilemma. He needed to listen to the heart sounds of a young woman with signs of heart disease. But the only method of listening to heart sounds known to Western medicine at the time was s
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Scientists have searched for the origins of human speech in the hoots, grunts, and other vocalizations made by primates. It would seem to make sense, after all, that such sounds may be related to the more varied and articulated sounds we humans make.
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The Mathematics Of Middle-Age Spread Lets say youre an 18 year old male who runs every other day, logging 12 miles a week. Now fast-forward to your late 40s. Your eating habits are the same. To maintain your high school weight, how many miles a week
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Why refrigerators hum? Why refrigerators hum，on toay's moment of science.On the recent program we have discussed how fluorocarboncoolant cools your food by coming to a boil in coils hidden in your fridge. How is this possible? When you boil water o
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By Deborah Tate Capitol Hill 05 July 2007 The Bush administration is seeking to update a law governing U.S. foreign intelligence surveillance. But members of the Democratic majority in Congress are signaling they may be reluctant to approve the propo
2007年VOA标准英语（七月）
By Nico Colombant Abuja 23 April 2007 International observers have condemned Nigeria's recently concluded ruling-party-dominated state, legislative and presidential elections, saying authorities failed the Nigerian people. Meanwhile, national observe
2007年VOA标准英语（四月）
By Gilbert da Costa Abuja 17 August 2006 Recent political killings in Nigeria have prompted fears about next year's general ballot. Election related violence has dogged Nigerian politics over the years, and some Nigerian groups are seeking divine in
2006年VOA标准英语（八月）
By Gilbert da Costa Abuja 29 May 2007 Even as Nigeria marks the inauguration of its new leader Umaru Yar'Adua, many in the West African nation claim to know very little about their president. Gilbert da Costa in this background report for VOA, profil
2007年VOA标准英语（五月）
By Nico Colombant Ogoniland, Nigeria 26 May 2007 Market women share anti-oil company feelings In Nigeria's oil-rich Niger Delta, one area, Ogoniland in Rivers State, resists oil production. Residents there say oil companies refuse to meet their deman
2007年VOA标准英语（五月）
By Catherine Maddux Washington 24 March 2006 Olusegun Obasanjo seen as he participates in National Population Census at Abuja Earlier this month, a Nigerian constitutional review panel recommended all
2006年VOA标准英语（三月）
By Phuong Tran Dakar 25 January 2007 The Nigeria-Cameroon commission is meeting in the capital of Cameroon to help resolve a decades-old and, at times, violent border dispute that has become a drawn-out legal process. Phuong Tran reports from VOA's W
2007年VOA标准英语（一月）
Why do Stradivarius violin s sound so good? 为什么史特拉第瓦里小提琴声音那么美妙？ A:What did i tell you？ B:You're right Yaoyao.This is a beautiful piece. A:It should be. B:What's so special about Stradivarius violin s ? A:Thats
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Bradycardia Don: Yal, isn't normal heart rate somewhere between sixty to one hundred beats per minute？ Yal: That's right, Don. Why? D: This would be the one time you don't correct me. My heart rate is only 44 beats per minute. That means I have bra
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Are Tanning Beds Safe? Millions of people go to tanning salons, some to get a base tan before they go away on a beach vacation. The idea of the base tan is that it will protect you from burning on your sun excursion, so that what you end up with is a
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As the Sun Turns 太阳也在自转？ Everyone knows that the earth turns. As a matter of fact, the sun turns too. Altough a lot of people don't realize it. Im not talking about being in orbit , nowthe earth definitely orbit s the sun and not the ot
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Why is it that you cant put down hydrogen gas? If you had a big balloon full of hydrogen gas, like the first gondola balloons pioneered in 18th-century France, youd find that it rises in the air quite dramatically. You know that a piece of wood will
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每次生病了，家里人最多说的一句话就是不吃药怎么行？。可是，有的时候吃药不一定就对身体有好处，反而有可能会帮助病原体攻击我们的身体。今天我们来了解了解一种新的理论达尔文医
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